diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 379441f..f5d3c6c 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -23,7 +23,7 @@ jobs:
       - name: Установка python
         uses: actions/setup-python@v4
         with:
-          python-version: 3.9
+          python-version: 3.8
       - name: Установка poetry
         uses: snok/install-poetry@v1
         with:
diff --git a/.idea/runConfigurations/statapp.xml b/.idea/runConfigurations/statapp.xml
index 3a0f2a0..c96e8cd 100644
--- a/.idea/runConfigurations/statapp.xml
+++ b/.idea/runConfigurations/statapp.xml
@@ -7,7 +7,7 @@
       <env name="PYTHONUNBUFFERED" value="1" />
     </envs>
     <option name="SDK_HOME" value="" />
-    <option name="SDK_NAME" value="Poetry (stat)" />
+    <option name="SDK_NAME" value="Poetry (statapp)" />
     <option name="WORKING_DIRECTORY" value="" />
     <option name="IS_MODULE_SDK" value="false" />
     <option name="ADD_CONTENT_ROOTS" value="true" />
@@ -21,4 +21,4 @@
     <option name="INPUT_FILE" value="" />
     <method v="2" />
   </configuration>
-</component>
\ No newline at end of file
+</component>
diff --git a/poetry.lock b/poetry.lock
index e192db7..403baaa 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -112,43 +112,39 @@ setuptools = "*"
 
 [[package]]
 name = "numpy"
-version = "1.26.0"
+version = "1.24.4"
 description = "Fundamental package for array computing in Python"
 optional = false
-python-versions = "<3.13,>=3.9"
+python-versions = ">=3.8"
 files = [
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 ]
 
 [[package]]
@@ -164,70 +160,66 @@ files = [
 
 [[package]]
 name = "pandas"
-version = "2.1.1"
+version = "2.0.3"
 description = "Powerful data structures for data analysis, time series, and statistics"
 optional = false
-python-versions = ">=3.9"
+python-versions = ">=3.8"
 files = [
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 [[package]]
 name = "pefile"
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+    {file = "shiboken2-5.15.2.1-5.15.2-cp35.cp36.cp37.cp38.cp39.cp310-none-win32.whl", hash = "sha256:eb0da44b6fa60c6bd317b8f219e500595e94e0322b33ec5b4e9f406bedaee555"},
+    {file = "shiboken2-5.15.2.1-5.15.2-cp35.cp36.cp37.cp38.cp39.cp310-none-win_amd64.whl", hash = "sha256:a0d0fdeb12b72c8af349b9642ccc67afd783dca449309f45e78cda50272fd6b7"},
 ]
 
 [[package]]
@@ -560,5 +513,5 @@ testing = ["big-O", "jaraco.functools", "jaraco.itertools", "more-itertools", "p
 
 [metadata]
 lock-version = "2.0"
-python-versions = ">=3.9,<3.12"
-content-hash = "a46a1262d4a6e27e44b1a59b5b668541846a1d2875705cba3dc22977a33eb4a0"
+python-versions = ">=3.8,<3.9"
+content-hash = "2ee72912250a8c96f04624c665fd1f86b222ac6561ae4f20bedb77160a8d4756"
diff --git a/pyproject.toml b/pyproject.toml
index b1448d9..1eecfc5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -8,12 +8,12 @@ authors = [
 readme = "README.md"
 
 [tool.poetry.dependencies]
-python = ">=3.9,<3.12"
-pyside6 = "^6.4.0"
-pandas = "^2.1.1"
-numpy = "^1.26.0"
+# windows 7 support
+python = ">=3.8,<3.9"
 pre-commit = "^3.4.0"
 pyinstaller = "^6.0.0"
+pandas = "^2.0"
+pyside2 = "^5.15.2.1"
 
 
 [build-system]
diff --git a/statapp/__main__.py b/statapp/__main__.py
index 43fe259..3005bdb 100644
--- a/statapp/__main__.py
+++ b/statapp/__main__.py
@@ -1,5 +1,5 @@
 import sys
-from PySide6.QtWidgets import QApplication
+from PySide2.QtWidgets import QApplication
 
 from statapp.main_window import MainWindow
 
@@ -8,7 +8,7 @@ def main():
     app = QApplication(sys.argv)
     window = MainWindow()
     window.show()
-    return app.exec()
+    return app.exec_()
 
 
 if __name__ == "__main__":
diff --git a/statapp/about_window.py b/statapp/about_window.py
index fabca21..8795fbc 100644
--- a/statapp/about_window.py
+++ b/statapp/about_window.py
@@ -1,5 +1,5 @@
-from PySide6.QtGui import QMovie
-from PySide6.QtWidgets import QMainWindow
+from PySide2.QtGui import QMovie
+from PySide2.QtWidgets import QMainWindow
 
 from statapp.ui.ui_about_window import Ui_AboutWindow
 from statapp.utils import resource_path
diff --git a/statapp/main_window.py b/statapp/main_window.py
index eda4124..56b684b 100644
--- a/statapp/main_window.py
+++ b/statapp/main_window.py
@@ -1,10 +1,9 @@
-from PySide6.QtCore import Slot
-from PySide6.QtWidgets import QMainWindow
+from PySide2.QtCore import Slot
+from PySide2.QtWidgets import QMainWindow
 
 from statapp.about_window import AboutWindow
 from statapp.ui.ui_main_window import Ui_MainWindow
 
-
 class MainWindow(QMainWindow):
     def __init__(self):
         super().__init__()
@@ -15,4 +14,4 @@ class MainWindow(QMainWindow):
     def on_aboutmenuaction_triggered(self):
         global about_window
         about_window = AboutWindow()
-        about_window.show()
\ No newline at end of file
+        about_window.show()
diff --git a/statapp/ui/ui_about_window.py b/statapp/ui/ui_about_window.py
index 9c7c5e5..725f828 100644
--- a/statapp/ui/ui_about_window.py
+++ b/statapp/ui/ui_about_window.py
@@ -3,20 +3,15 @@
 ################################################################################
 ## Form generated from reading UI file 'about_window.ui'
 ##
-## Created by: Qt User Interface Compiler version 6.5.2
+## Created by: Qt User Interface Compiler version 5.15.2
 ##
 ## WARNING! All changes made in this file will be lost when recompiling UI file!
 ################################################################################
 
-from PySide6.QtCore import (QCoreApplication, QDate, QDateTime, QLocale,
-    QMetaObject, QObject, QPoint, QRect,
-    QSize, QTime, QUrl, Qt)
-from PySide6.QtGui import (QBrush, QColor, QConicalGradient, QCursor,
-    QFont, QFontDatabase, QGradient, QIcon,
-    QImage, QKeySequence, QLinearGradient, QPainter,
-    QPalette, QPixmap, QRadialGradient, QTransform)
-from PySide6.QtWidgets import (QApplication, QFrame, QGridLayout, QLabel,
-    QMainWindow, QSizePolicy, QWidget)
+from PySide2.QtCore import *
+from PySide2.QtGui import *
+from PySide2.QtWidgets import *
+
 
 class Ui_AboutWindow(object):
     def setupUi(self, AboutWindow):
@@ -87,4 +82,3 @@ class Ui_AboutWindow(object):
         self.labelbasegigamen.setText(QCoreApplication.translate("AboutWindow", u"\u0422\u0435\u043e\u0440\u0435\u0442\u0438\u0447\u0435\u0441\u043a\u0438\u0439 \u0444\u0443\u043d\u0434\u0430\u043c\u0435\u043d\u0442: \u0414\u043c\u0438\u0442\u0440\u044e\u043a \u0422. \u0413.", None))
         self.labelgif.setText("")
     # retranslateUi
-
diff --git a/statapp/ui/ui_main_window.py b/statapp/ui/ui_main_window.py
index 15b890f..866c384 100644
--- a/statapp/ui/ui_main_window.py
+++ b/statapp/ui/ui_main_window.py
@@ -3,22 +3,15 @@
 ################################################################################
 ## Form generated from reading UI file 'main_window.ui'
 ##
-## Created by: Qt User Interface Compiler version 6.5.2
+## Created by: Qt User Interface Compiler version 5.15.2
 ##
 ## WARNING! All changes made in this file will be lost when recompiling UI file!
 ################################################################################
 
-from PySide6.QtCore import (QCoreApplication, QDate, QDateTime, QLocale,
-    QMetaObject, QObject, QPoint, QRect,
-    QSize, QTime, QUrl, Qt)
-from PySide6.QtGui import (QAction, QBrush, QColor, QConicalGradient,
-    QCursor, QFont, QFontDatabase, QGradient,
-    QIcon, QImage, QKeySequence, QLinearGradient,
-    QPainter, QPalette, QPixmap, QRadialGradient,
-    QTransform)
-from PySide6.QtWidgets import (QApplication, QGridLayout, QHeaderView, QLabel,
-    QMainWindow, QMenu, QMenuBar, QSizePolicy,
-    QStatusBar, QTableView, QWidget)
+from PySide2.QtCore import *
+from PySide2.QtGui import *
+from PySide2.QtWidgets import *
+
 
 class Ui_MainWindow(object):
     def setupUi(self, MainWindow):
@@ -83,4 +76,3 @@ class Ui_MainWindow(object):
         self.modelmenu.setTitle(QCoreApplication.translate("MainWindow", u"\u041c\u043e\u0434\u0435\u043b\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435", None))
         self.helpmenu.setTitle(QCoreApplication.translate("MainWindow", u"\u0421\u043f\u0440\u0430\u0432\u043a\u0430", None))
     # retranslateUi
-